linux-kernel - Re: [PATCH 3/6] KVM MMU: optimize/cleanup for marking parent unsync

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Message-ID: <20100412171211.GC4976@amt.cnet>
Date:	Mon, 12 Apr 2010 14:12:11 -0300
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
Cc:	Avi Kivity <avi@...hat.com>, KVM list <kvm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/6] KVM MMU: optimize/cleanup for marking parent unsync

On Mon, Apr 12, 2010 at 04:02:24PM +0800, Xiao Guangrong wrote:
> - 'vcpu' is not used while mark parent unsync, so remove it
> - if it has alread marked unsync, no need to walk it's parent
> 
> Signed-off-by: Xiao Guangrong <xiaoguangrong@...fujitsu.com>

Xiao,

Did you actually see this codepath as being performance sensitive? 

I'd prefer to not touch it.

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